I have tracked this down to a point where I don't know what to do.
The problem is that the debug iterator calls consumeNext on it's
theChildren[1], which is an eval iterator.
(debug_iterator_impl.cpp:169). If this eval iterator raises a runtime
exception (for example, an invalid expression like the one shown in the
comment above) in eval.cpp:198, while calling:
state->thePlanWrapper->next(result), the execution jump out of
EvalIterator::nextImpl without calling state->thePlanWrapper = NULL; in
eval.cpp:203.
Therefore a second call to the same eval iterator will fail in
eval.cpp:187 at "=" (something that has to do with an RCObject that
calls ~PlanWrapper.
What I don't know is how to simulate
state->thePlanWrapper = NULL;
from a catch outside the caller of the eval iterator's nextImpl
Assigning to Markos.
** Changed in: zorba
Assignee: Gabriel Petrovay (gabipetrovay) => Markos Zaharioudakis
(markos-za)
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https://bugs.launchpad.net/bugs/914655
Title:
XQDB: Assertion `str.size() == length' failed.
Status in Zorba - The XQuery Processor:
Confirmed
Bug description:
I am able to produce an assertion in xqdb on ubuntu 10.04 64bit.
Query:
for $x in (1,2,3)
let $y := $x+1
return $y
Protocol:
./bin/xqdb -f -q debugger.xq
Communication port: 28028
Zorba executable: ./bin/zorba
Zorba arguments: -d -f -q debugger.xq
Zorba XQuery Debugger Server
Copyright 2006-2009 The FLWOR Foundation.
License: Apache License 2.0: <http://www.apache.org/licenses/LICENSE-2.0>
Established connection with XQuery client zorba
(xqdb) break -f debugger.xq -l 2
set breakpoint with id 1 and state enabled
(xqdb) run
<?xml version="1.0" encoding="UTF-8"?>
break in query body at /home/dagraf/zorba/build/debugger.xq:2
2 o| let $y := $x+1
(xqdb) print -c x
Error: Error while evaluating expression.
(xqdb) print -c $x
Segmentation fault
xqdb: /home/dagraf/zorba/sandbox/src/debugger/debugger_clientimpl.cpp:60:
virtual void zorba::DebuggerListener::run(): Assertion `str.size() == length'
failed.
Aborted
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